How does particle size affect the viscosity and flow rate of a fluid.(small particles, medium particles, large etc...)

Can someone me with questions 15 to 17 plz.

Consider the following reaction at equilibrium. 2co2 (g) 2co (g) + o2 (g) h° = -514 kj le châtelier's principle predicts that the equilibrium partial pressure of co (g) can be maximized by carrying out the reaction a. at high temperature and high pressure b. at high temperature and low pressure c. at low temperature and low pressure d. at low temperature and high pressure e. in the presence of solid carbon

All forces cause motion? true or false